What is the gravitational field strength of a planet when the weight of a 100 kg astronaut is 400 N? a) ¼ N kg-1 b) 9.8 N kg-1 c) 4 N kg-1 d) infinity The only natural satellite of the earth complete orbits in about a) 24 days b) 27.3 days c) 30 days … Continue reading Class XI CBSE – Revision Questions MCQ – Semester 1
A rifle at a height H aimed horizontally fires a bullet to the ground. At the same time , a bullet with the same mass in dropped from the same height. Neglecting air resistance, which one hits the ground first?Explain.
Both will hit t...
TWIN PARADOX is a paradoxical situation coming in while explaining the theory of relativity. “Time dilation” is one of the important consequences of relativity. It says that if a body is moving with relativistic speeds, time will dialate ...
A body is dropped from a tower of height 96 m. Another body is thrown up from the ground after a second with a velocity of 40 m/s. When and where they will meet?
For the first body,
Let S=x (from top)
x=0.5 gt2 &#...